🔍 Read the full analysis: The Case For Calling AI’s 5X A Subsidy, Not A Price on ThorstenMeyerAI.com
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TL;DR
SemiAnalysis measured token allowances across major AI subscriptions and compared them with the cost of the same usage at API list prices. In its agentic coding workload, Claude plans offered about 5.4 to 5.6 times the API-equivalent value of similarly priced ChatGPT plans, but the report says that gap depends on model mix, usage limits and prices that providers can change.
SemiAnalysis has measured token allowances across major AI subscriptions and compared them with first-party API list prices. In its coding-agent workload, Claude plans returned about 5.4 to 5.6 times the API-equivalent value of similarly priced ChatGPT plans, a result that bears on how users compare monthly fees but depends on the models and limits included.
The report tested plans from Anthropic and OpenAI, as well as subscriptions from Meta, SpaceXAI, Cursor, Cognition, Z.ai, MiniMax and Moonshot. It tracked how each provider’s usage meter moved for different token types, then estimated the API cost of the usage allowed by each plan. SemiAnalysis defines “API value” as the plan’s full monthly usage limit priced at first-party list rates.
For its agentic workload, which the report says was mostly cached input, the comparison put a $20 Claude Pro plan at $1,178 in API-equivalent usage and ChatGPT Plus at $211, or about 5.6 times as much. At $100, Claude Max 5x was estimated at $5,725 versus $1,055 for ChatGPT Pro 100. At $200, Claude Max 20x came to $11,726 against $2,084 for ChatGPT Pro 200. These are estimates based on the report’s measured allowances and listed API rates, not cash savings or guaranteed usage.
The report says the difference remains large when measured in raw tokens, which reduces the effect of Opus 5.5’s higher per-token price compared with GPT-6.1 Sol. At the frontier tier, however, its comparison is closer: a $200 plan’s allowance corresponds to about $2,897 of GPT-6 Astra usage, while Claude’s allowance was half-used after about $2,485 of Claude Fable 5.1. The remaining half of the Claude allowance can be used on Opus or Sonnet.
The 5x is a subsidy, not a price
SemiAnalysis metered the meters — every major AI subscription, token type by token type, converted to API list value. On the mid-tier models both labs call the daily driver, a Claude plan returns ~5–6× the API value of the matching ChatGPT plan. Real — and the least durable number in the report.
…and the plan is fully exhausted. One pool for every model.
…and the plan is only half used — Fable is capped at 50% of the limit, leaving the rest for Opus/Sonnet. That’s where the mid-tier gap compounds.
- $200 plan halved — Sol-class value down >50% (6.1 Sol cache price cut compounds it)
- Old limits kept until 29 October; new buyers cut immediately
- New $500 tier: only +21% Astra vs the old $200 — real draw is 300 TPS Ultrafast
- Ladder flattened: Pro 100/200/500 now identical per dollar; multipliers removed from pricing page
- In OpenAI’s favour: no 5-hour window on Pro plans — easier to use the full allowance
- Flat per-dollar value across all tiers, before and after
- New premium models placed at lower relative limits (Fable capped at 50%)
- Opus allowances raised ~20% (Max) / ~50% (Pro) with the 5.5 price cut — not enough to fully offset it
- Repeatedly walked back planned cuts earlier this year under pressure from OpenAI’s generosity
- Twelve months ago, OpenAI was the generous option. Positions swap.
Gross margin per plan, assuming 92% API gross margins. The subsidy lives almost entirely in Opus and Sonnet usage — Anthropic would already be near software-like subscription margins if everyone used only Fable. Subscriptions matter even more for OpenAI, where they’re a larger share of revenue.
Three identical subscriptions; one had ~20% lower limits. The provider (unnamed) confirmed an “extremely tiny” A/B test on limit balancing. Two lessons: limits can change silently, per account, at any time — and you won’t know without instrumentation. The usage bar is a percentage, not a contract.
If you’re choosing a plan this month for agentic coding on a mid-tier model, the report settles it: a Claude plan returns ~5–6× the API value of the matching ChatGPT plan. But a plan returning 58× its fee on a model served at a steeply negative margin for heavy users is a marketing budget with a usage meter. Value moves silently, gets A/B tested per account, and twelve months ago ran the other way. Use the subsidy while it exists — it’s genuinely large. Don’t build a cost model on it. Price workloads at API rates, keep a router between you and any one vendor, and benchmark open weights on your own hardware for steady volume. A deal you can’t verify isn’t a price. It’s weather.
Plan Value Depends on Use
The comparison matters to subscribers weighing monthly fees against model access, especially people running coding agents that generate large volumes of cached input. But the report’s ratios do not tell every user which plan is cheaper in practice: value changes with model choice, token mix, actual usage and plan restrictions. OpenAI’s Pro plans have no five-hour window, SemiAnalysis says, allowing heavy users to use more of their monthly allowance in a burst. That may narrow the practical gap for some workloads.
The report also connects subscription pricing to provider costs. SemiAnalysis estimates subscriptions account for about 10% of Anthropic revenue but can consume over 40% of inference compute, reducing blended revenue per megawatt by roughly $36 million. Those are the report’s estimates, and they point to a tension: generous limits can attract and retain customers while making heavy use costly to serve. The report estimates that a fully maxed-out Opus 5.5 subscriber could imply a gross margin of roughly minus 369%, assuming 92% API gross margins; at 20% average utilization, its estimate rises to about 6%. These modeled figures depend on the assumptions and utilization levels used.
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Recent Changes to Plan Limits
SemiAnalysis measured the plans after a recent OpenAI reduction to its $200 plan. The report says token allowances per model tier were roughly halved. For Sol-class models, estimated API-equivalent value fell by more than half because OpenAI also lowered GPT-6.1 Sol’s cached-input price. Existing $200 subscribers keep their previous limits until October 29; new customers receive the lower limits immediately, according to the report.
OpenAI also introduced a $500 tier. SemiAnalysis estimates it provides about 21% more Astra than the former $200 plan, and less Sol-class API value, while offering a 300-token-per-second “Ultrafast” mode the firm says it is still testing. The report says OpenAI’s Pro 100, 200 and 500 tiers now provide identical tokens per dollar and that the company removed “5x more usage” and “20x more usage” multipliers from its pricing page.
Anthropic has cut prices on Fable 5.1 and Opus 5.5. SemiAnalysis says Fable 5.1’s cache reads cost 75% less than Fable 5’s, with no increase in token limits. Opus 5.5’s input and output prices fell 20%, and cache reads 60%; the report estimates allowances rose about 20% on Max and 50% on Pro, not enough to offset the price cuts in API-equivalent terms. It says OpenAI did not raise Sol limits when GPT-6.1 shipped, leaving the $200 plan’s estimated API value about 30% lower.
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Limits and Costs Can Shift
The estimates depend on measured allowances, listed API prices and a particular token mix. The report’s workload was heavily weighted toward cached input, so users with different tasks or model choices may see different relative value. A plan’s nominal monthly allowance also does not establish how much an individual subscriber will consume or what their realized cost would be.
How providers will adjust subscription limits as model prices and inference costs change remains unclear. The report’s revenue and gross-margin figures are estimates based on assumptions about utilization and API margins. The supplied findings do not establish how long current plan terms will last, whether OpenAI’s Ultrafast mode will change the value of its $500 plan, or whether future model releases will bring allowance changes.
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Watch for Further Plan Changes
The next concrete date in the report is October 29, when existing subscribers on OpenAI’s $200 plan are due to move from their grandfathered limits to the reduced allowance. SemiAnalysis says it is still testing the new Ultrafast mode; its findings on that feature could clarify how much the $500 tier’s speed offering changes its appeal.
For subscribers comparing plans, the relevant figures may change when providers revise model prices, token limits or access rules. SemiAnalysis’s measurements offer a snapshot of the plans it tested. The report does not establish what the providers will change next or when they will do so.
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Key Questions
What does “API-equivalent value” mean in the report?
It is the estimated API list-price cost of the tokens allowed by a subscription’s full monthly limit, using the provider’s first-party rates. It is not a cash rebate or a prediction of each subscriber’s actual use.
Which plans showed the largest difference?
For the report’s agentic coding workload, Claude plans showed about 5.4 to 5.6 times the API-equivalent value of similarly priced ChatGPT plans. The comparison depends on the models and token mix tested.
When do OpenAI’s reduced $200 plan limits apply to existing subscribers?
SemiAnalysis says existing subscribers keep their old limits until October 29. New purchases receive the reduced limits immediately.
Do lower API prices automatically improve subscription value?
Not by this measure. If a provider lowers API prices without raising subscription allowances, the same allowance corresponds to a lower API-equivalent value. The report says Anthropic and OpenAI made different allowance changes alongside recent price cuts.
Source: ThorstenMeyerAI.com
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